The test code:
 
import java.awt.*;
public class Test {
  public static void main(String[] args) throws Exception {
    final Frame f = new Frame("F");
    final FileDialog fd = new FileDialog(f);
// final Dialog fd = new Dialog(f, true);
    new Thread(new Runnable() {
      public void run() {
        fd.setVisible(true);
      }
    }).start();
    Thread.sleep(3000);
    System.err.println("before dispose");
    System.err.flush();
    fd.dispose();
    System.err.println("after dispose");
    System.err.flush();
    new Thread(new Runnable() {
      public void run() {
        System.err.println("run");
        System.err.flush();
      }
    }).start();
    System.err.println("thread started");
    System.err.flush();
    f.dispose();
  }
}

hangs/crashes JVM that was built by MSVS2008/2010